基于滑模控制的小型风电并网MPPT控制研究  

Research of MPPT Based on Sliding Mode Control of Small-Sized Wind Power Grid-Connected System

作　　者：吴少石 解恩[1] 曾世 刘惠婷[1] 

机构地区：[1]西北工业大学,西安710129

出　　处：《微特电机》2016年第8期117-121,共5页Small & Special Electrical Machines

摘　　要：针对小型单相风力发电并网系统(发电机额定功率1 k W),基于滑模控制的强鲁棒性和快速响应特性,设计了一种滑模MPPT控制算法,并做了优化。该并网系统由MPPT控制算法直接给定并网电流有效值,并捕捉电网电压波形来共同确定系统给定的并网电流参考值,以此来实现并网系统的MPPT控制要求。通过MATLAB/Simulink仿真软件对该系统控制方案进行仿真分析,仿真结果说明所设计的滑模MPPT控制算法能够使得整个并网系统快速有效地跟踪最大功率点以及实现并网时功率因数等于1;优化后的方案能够一定程度削弱系统在稳态运行时的抖振以及并网电流波形畸变的问题。Based on the strong robustness and fast response of sliding mode control, a sliding mode MPPT control algorithmfor small-sized wind power grid-connected system （nominal power of the generator is 1 kW） was designed, then optimized.To realize MPPT control requirement in this grid-connected system, the virtual value of grid-connected currentwas given by MPPT control algorithm, and with the captured waveform of network voltage, those two determined the givengrid-connected current reference value of system. Through analyzing the control scheme of grid-connected system withMATLAB/Simulink, the simulation results indicat that the designed sliding mode MPPT control algorithm can make wholesystem track the maximum power point rapidly and effectively, and the power factor is 1 when paralleling in the grid. Moreover,it can weaken the problem of buffet when operating in steady state and waveform distortion of grid-connected currentin a certain extent after being optimized.

关 键 词：风力发电 并网 最大功率点追踪 滑模控制 

分 类 号：TM315[电气工程—电机]